Remove/Install Heater Unit - AR83.70-P-5302LW
WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.
Model 205
with code 228 (Additional warm water heating)
Model 213
with code 228 (Additional warm water heating)
Model 253
with code 228 (Additional warm water heating)
Shown on model 205.0
Shown on model 205.0
Shown on model 205.0
Shown on model 205.0
Shown on model 205.0
| Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit | Do not operate stationary heater, auxiliary heater or engine with heater booster in closed f rooms or when refueling. Allow heater unit to cool down after operation and wear protective gloves. | AS83.70-Z-0002-01A | |
| Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contact with fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel. | AS47.00-Z-0001-01A | |
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. | AS20.00-Z-0001-01A | |
| Notice | Notes on coolant | Model 205 with engine 177, 274, 276, 626, 651, 654 with code 228 (Additional warm water heating) Model 213 with engine 177, 256, 274, 276, 642, 654 with code 228 (Additional warm water heating) Model 253 with engine 177, 256, 274, 276, 642, 651, 654 with code 228 (Additional warm water heating) |
AH20.00-P-2080-01KOA |
| Notice | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Remove/install | |||
| 1 | Detach Ground line of on-board electrical system battery | AR54.10-P-0003LW | |
| 2 | Detach right front wheel | AR40.10-P-1102A | |
| 3 | Remove rear section of fender liner in right front fender | Model 205, 253 with code 228 (Additional warm water heating) | AR88.10-P-1300LW |
| Model 213 with code 228 (Additional warm water heating) | AR88.10-P-1300LWE | ||
| 4 | Remove center engine compartment paneling | Model 205, 253 with code 228 (Additional warm water heating) | AR61.20-P-1105LW |
| Model 213 with code 228 (Additional warm water heating) | AR61.20-P-1105LWE | ||
| 5 | Drain coolant | Model 205, 213, 253 with code 228 (Additional warm water heating) | |
| Model 253 with engine 642 with code 228 (Additional warm water heating) | AR20.00-P-11420GY | ||
| Model 205 with engine 177, 274.9, 276.8, 626, 651 with code 228 (Additional warm water heating) Model 253 with engine 274.9, 276.8, 651 with code 228 (Additional warm water heating) |
AR20.00-P-1142LW | ||
| Model 213 with engine 274, 276.8, 642, 654 with code 228 (Additional warm water heating) | AR20.00-P-11420LC | ||
| 6 | Slacken the clamp on the flex tube of the muffler of the stationary heater unit (A6) and remove the flex tube | ||
| 7 | Open clamp (5), remove coolant hose (6) and close connections | Fig 3 | |
| Fig 2 | |||
| 8 | Unfasten locking clamp (7), remove coolant hose (20), and seal connections using suitable stop plug | Otherwise, the electrical connectors below could be damaged. |
Fig 3 |
| 9 | Disconnect electrical connectors (9) at stationary heater control unit (A6n1) | ||
| Risk of injury caused by burns to skin and eyes. Risk of poisoning caused by inhaling fumes when working with heat-shrinkable tubing. | Work in well ventilated rooms only. Wear safety glasses with side protection and protective gloves. | AS00.19-Z-0001-01A | |
| 10 | Remove fuel hose (29) from fuel line (11) and seal connections using stop plugs | ||
| Fig 4 | |||
| Fig 3 | |||
| 11 | Unscrew nuts (12) | ||
| 12 | Extend stationary heater unit (A6) from bracket (13) and place to one side | ||
| 13 | Loosen nut (14) and remove exhaust pipe (15) from stationary heater unit (A6) | When replacing the stationary heater unit (A6). | |
| 14 | Unclip retaining clip (16) from bracket (17) and remove air intake (18) from stationary heater unit (A6) | When replacing the stationary heater unit (A6). |
|
| 15 | Unhook coolant hose (20) from bracket (21) | When replacing the stationary heater unit (A6). | |
| 16 | Detach foam pads (19) | When replacing the stationary heater unit (A6). |
|
| 17 | Open clamp (22) and remove coolant line (20) | When replacing the stationary heater unit (A6). |
Fig 2 |
| 18 | Remove bolt (23) | When replacing the stationary heater unit (A6). | |
| 19 | Open clamp (24) and remove coolant line (25) | When replacing the stationary heater unit (A6). |
Fig 2 |
| 20 | Remove screws/bolts (26) and remove retaining plate (27) | When replacing the stationary heater unit (A6). | |
| 21 | Remove holder (28) | When replacing the stationary heater unit (A6). | |
| 22 | Detach fuel hose (29) from stationary heater unit (A6) | When replacing the stationary heater unit (A6). |
|
| 23 | Install in the reverse order | ||
| 24 | Perform initial startup of stationary heater using the diagnostic system | When replacing the stationary heater unit (A6). | |
↓ Rectify fault interlock using diagnostic system |
AD00.00-P-2000-04B | ||
| 25 | Carry out function check of stationary heater | If the stationary heater unit (A6) was not replaced. ↓ Rectify fault interlock using diagnostic system. |
|
| AD00.00-P-2000-04B |